(A) General standards.
(1) When possible, existing natural drainageways, and vegetated soil surfaces must be used to convey, store, filter, and retain stormwater runoff before discharge to public waters.
(2) Development must be planned and conducted in a manner that will minimize the extent of disturbed areas, runoff velocities, erosion potential, and reduce and delay runoff volumes. Disturbed areas must be stabilized as soon as possible, and appropriate facilities or methods used to retain sediment on the site.
(3) When development density, topography, soils, and vegetation are not sufficient to adequately handle stormwater runoff, constructed facilities such as settling basins, skimming devices, dikes, waterways, ponds and infiltration may be used. Preference must be given to surface drainage, vegetation, and infiltration rather than buried pipes and man-made materials and facilities.
(B) Specific standards.
(1) Impervious surfaces of lots must not exceed 25% of the lot area.
(2) When constructed facilities are used for stormwater management, documentation must be provided by a qualified individual that they are designed and installed consistent with the field office technical guide of the local soil and water conservation district or the Minnesota Stormwater Manual, as applicable.
(3) New constructed stormwater outfalls to public waters must be consistent with Minn. Rules Part 6115.0231.
(Ord. 97-2021, passed 7-20-21)